Mystery of Matrimony

I recently attended a Byzantine Catholic wedding, and the bride and groom did not recite wedding vows. Why?

Traditionally, in the Byzantine Churches vows are not exchanged during the wedding ceremony. Rather, the most significant event is the placing of the crowns on the heads of the bride and groom, together with the blessing of the priest. However, some Byzantine Catholic Churches added vows to the ceremony in an attempt to conform to Western culture.